Question

A ball fell of a cliff in to the river from a height of 25 feet. The function h=-30t^2+25 gives the ball's height h above the water after t seconds. How much time does it take for the ball to hit the water? What is the vertex of the function's graph?

Answer 1

.913 Seconds using calculator.

Answer 2

i hope it helps ^.^

Answer 3

Thanks but i also have to graph it by hand so...